A boy watches a giant digger shovel at the booth of the German company Liebherr at the International Trade Fair for Construction Machinery, Building Material Machines, Mining Machines, Construction Vehicles and Construction Equipment 'BAUMA' in Munich, southern Germany, on April 18, 2013. More than 3.400 exhibitors from 57 countries shows their newest products during one of the great trade fair until April 21, 2013. Photo: AFP/Getty Images

Visitors stand at a site crane at the booth. Photo: AFP/Getty Images

A visitor watches giant wheels of a site vehicle. Photo: AFP/Getty Images

Visitors watch a digger shovel of a site vehicle. Photo: AFP/Getty Images

A visitor watches angledozers. Photo: AFP/Getty Images

Visitors watch vehicles at the booth of the German company Liebherr. Photo: AFP/Getty Images

Visitors pose in a giant digger shovel. Photo: AFP/Getty Images

Visitors watch a giant site vehicles of the Korean company Doosan. Photo: AFP/Getty Images

Bauma International Trade Fair

A boy watches a giant digger shovel at the booth of the German company Liebherr at the International Trade Fair for Construction Machinery, Building Material Machines, Mining Machines, Construction Vehicles and Construction Equipment 'BAUMA' in Munich, southern Germany, on April 18, 2013. More than 3.400 exhibitors from 57 countries shows their newest products during one of the great trade fair until April 21, 2013. Photo: AFP/Getty Images